Anime wallpaper artist know what I'm talking about when it comes to scans, but this tutorial works on all images that you want to clean, not just anime images, I just used an anime Character because I had an extracted Scan on hand.
Admins take note of this:
Onodera Karen & Please! Twins (Onegai! Twins) are © 2004-2005 Bandai Entertainment, Inc.
I'm not taking credit for the Anime image